Default parameters

[Terry Reedy]

"Bengt Richter" <bokr at oz.net> wrote in message
news:bs1lov$3vu$0 at 216.39.172.122...
> That's useful, but IMO not the optimal syntax,
because cache here is really not
> being used as a parameter. That's why I would
like a way to bind locals similarly
> without being part of the calling signature.
E.g.,
>
> def _tento(n)(
>     # preset bindings evaluated here at def-time
>     cache={}
> ):
>     try:
>         return cache[n]
>     except KeyError:
>         answer = cache[n] = 10L ** n
>         return answer

I have also thought of using a ';' as in
def _tento(n; cache = {}):
  [etc]

to indicate a def-time initialized  non-parameter.

Terry J. Reedy